Lighting fixture



I March 7, 1933. R B H LE I 1,900,380

LIGHTING FIXTURE Filed April 4, 1932 Flt-3-1- IN VEN TOR.

Pea/6m B. Ha/e WW ATTORNEY r=ous requirements of difierent specificappli- Patented Mar. 7,1933

TREUBYEN RHALE, or SANFRANCISCO, CALIFORNIA LIGHTING Application filedApril 4,-

VTherpresent invention relates to lighting fixtures, and moreparticularly to thatclass ofthese devices which is-especially designedto reflect and diffuse light so as to {obtain the most efiicientdistribution thereof.

Lighting fixtures for industrial lighting have been developed to a highdegree of efficiency in eflecting distribution of light from a source inaccordance with the varications, but such fixtures are notadapted foruse in any location where the appearance of the fixture is a materialconsideration. The reason for this is found in the fact that theconformation of a highly eliicient fixture is closely limited bypurelytechnical-requirements, and hence any material deviation -from thetechnically indicated outline, in

the interests of appearance, leads to a. marked loss in lightingefliciency.

From :this consideration itlappears that nosatisfactorily ornamentalfixture can effect alone an efficient distribution of the light, and,hence, locations which require an ornamental fixture have lackedsatisfactory lighting because of the low efficiency of such fixtures. 1Y i It is the primary object of this invention toprovide a lightingfixture of ornamental appearance which will at the same time.ef-' feethighly eflicient light distribution.

Another object of the invention is the provision of an ornamentalfixture of the type above described in which the choice of a widevariety of external forms is permitted without adverse effect upon thelighting eificiency.

Another object of the invention is the pro-- vision of a fixture of thetype above described. in which a wide variety of technically efficientlight distributing devices may be, incorporated in the same form ofornamental casing.

Another object of the invention is the provision of an ornamental lightfixture casing which will assist the distribution of light by atechnically satisfactory light fixture associated therewith.

Other objects of the invention will appear as this descriptionprogresses. I

A preferred form ofthe invention, adapt- FIXTURE 1932. Serial No.602,932.

ed for-certain specific lighting requirements,

--is shown in the accompanying drawing ,;in

which: 7 7

Figure 1 is a side OlBYaiLlOH of the novel fixture having certainportions cut away to '55 show the structure thereof, and

'l igurei2 is a bottom planview thereof; v'The sourceof illumination maybe any well known: means adapted for :the (purpose such as anielectriclamp, As shown,--it is* enclosed in a difl'using reflector of heavy,pressed prismatic glass 1 connected to the central support 2 by anysuitable'means'such as hooks 3 from which, .preferably,it is removableforcleaning. 1

' The diffusing reflector shown is ofawell known type andofaspecies-shaped particu larly for useonlow ceilings where thefix-.tures are to be spacedapart about two times the mounting height of thefixtures. It will be understoodthat the invention is not considered tobe limit-ed to this specific form of diffusing reflector, but, forinstance .in cases where the mounting height above the surface to beilluminated equals, or exceeds 175 the spacing of th'efixtures, a moreconical form of diffusing reflector maybe substituted; In thisway themosteflicient conformation ,of difl'using reflector or other lightsource "may be selected, attention being paid" only to the particularlighting requirements, and the appearance of the fixture beingwhollydisregarded. I

The fixture asishowni at 1 is designed to reflect a large part aofftheillumination from the light source idownward ly in a conical beamand tothrow adifl'used lightsidewardly and upwardly. Since such fixtures arepurely utilitarian inpurpose, the ,fact that they are sometimes soconstructedas to throw* spotty-shadows onthe ceiling-above them, 1s

-inot;important in the application for which they aredesigned, but wouldbe-quite obj-ectionable in any iap'plication where the general artisticeffect is a material consideration. The presentiin vention thereforecontemplates an auxiliary casing for :such fixtures which will take fulladvantage of their downward glighting -efficiency,- leave unimpairedtheir.

idewerd; d fiusing :eifecjt, and ,remedythed a ficiencies in theirupward lighting, at the same time providing an ornamental fixture,

the form of which may be varied to suit the general plan of thesurroundings in which it is to be used.

1 Ihe casing here illustrated for accomplishing these purposes,comprises a plurality of angular uprights 4t surrounding the fixture 1 7preferably of sand blasted or frosted glass,

which serve to conceal the fixture 1 as well as to assist the difiusionof the lateral light, therefrom. The lower edge ofeach panel 7 isreceived. in the groove'of one of the channeled members 5 while itsupper end is held against inward movenient'by the diii'using "panelSsupported on projectionst) secured to the upright member 4, as shown. IThe entire casing fixture above described is so hung with respect to thefixture 1 that the lower edge of the said fixture will not aiiect thedownward light thrown by the said fixture l,it being substantially. outof the downwardly reflected beam. 7

It is thus evident that the present invention provides a highlyefiicient form of ornamental lighting fixture, comprising a lightdistributing fixture the form of which may be readily changed to securemaximum efficiency under the conditions of use without thought to itsappearance, and an ornamental casing the form of which may be widelyvaried to conform with the artistic requirements'of the location inwhich the fixture is to be used,

without thought of its lighting efliciency per se, since it is designedto leave unafiected the primary direct and refiectedlight of the fixture1, to leave substantially unaffected, except for a. slight enhancement,the secondary or lateral difiused illumination effected by said fixture,and to slightly vary the tertiary or upward diffused illuminationprovided by said'fixture for the purpose of remedying an inherent defecttherein which would ordinarily make it undesirable for other than purelyutilitarian purposes. At the same time a fixture has been providedhaving many desirable features of constructional simplicity andstrength. 1

It has been emphasized herein that the various elements of thecombination described above are capa'ble of widevariation, both for thepurpose of securing various lighting efiectsand for the purpose ofsecuring an 4 artistic eifect in harmony with the surroundings in, whichthe device is to be used, and it should therefore be understood that thescope of the invention is considered to be limited only by the followingclaims:

1. In a lighting fixture, a source of light, means associated therewithforgiving oii a diffused beam and a reflected beam, and a casing forsaid means having an aperture in the path of said reflected beam anddifi'using means in the path of said'dift'used beam.

2. In a lighting fixture, a source of light, means associated therewithfor giving off a reflected downward beam, an evenly diffused lateralbeam, and an unevenly diffused upward beam, and a casing for said meanshav ing an aperture in the path of said reflected beam, translucentmaterial in the path of said evenly diffused beam, and a dii'l'usingplate in the path of said unevenly diffused beam 3. In a lightingfixture, a source of light, a light distributing device associatedtherewith for projecting beams of difiering characteristics in differentdirections respectively, and an ornamental casing for said device havingelements of different character in the path of each characteristicallydistinct beam lucent portion in the path of the diffused" lightemanating from said hood and an aperture adapted to pass substantiallyall light reflected from said hood.

In witness whereof I have hereunto set my hand this twenty-eighth day ofMarch,

REUBEN B. HALE,

